This is a genus of around 60 evergreen plants from the tropics and sub-tropics. They have colourful funnel-shaped or bell-shaped flowers. They should be grown either in a glasshouse.
Species suitable for cultivation in a stovehouse include P.cathartica, P.hirsutula, P.learii and P.muabilis.
Species for the greenhouse include P.lindheimeri and P.tyrianthina.
The temperature should range between 18-24oC in the summer and 13-18oC in the winter. Water generously during the growing season buy moderate watering otherwise.